Multi-Stroke Cylinder Operation in an Internal Combustion Engine

• US 20080041327A1
• Filed: 10/26/2007
• Published: 02/21/2008
• Est. Priority Date: 03/19/2004
• Status: Active Grant

• Current Assignee: Ford Global Technologies, LLC (Ford Motor Company)
• Original Assignee: Ford Global Technologies, LLC (Ford Motor Company)
• Inventors: Trask, Nate, Lewis, Donald, Russell, John, Megli, Thomas
• Granted Patent: US 7,401,606 B2
• Time in Patent Office: Days
• US Class Current: 123/179.3
• CPC Class Codes: B60W 10/06 including control of combustion engines
• CPC Class Codes: B60W 20/00 Control systems specially adapted for hybrid vehicles hybrid vehicle design, B60K6/00; electric vehicles B60L
• CPC Class Codes: B60W 30/192 Mitigating problems related to power-up or power-down of the driveline, e.g. start-up of a cold engine
• CPC Class Codes: F01L 13/0005 Deactivating valves
• CPC Class Codes: F01L 2013/001 Deactivating cylinders
• CPC Class Codes: F01L 2800/01 Starting
• CPC Class Codes: F01L 9/20 by electric means
• CPC Class Codes: F02D 13/0215 changing the valve timing only
• CPC Class Codes: F02D 13/0253 Fully variable control of valve lift and timing using camless actuation systems such as hydraulic, pneumatic or electromagnetic actuators, e.g. solenoid valves
• CPC Class Codes: F02D 13/0257 Independent control of two or more intake or exhaust valves respectively, i.e. one of two intake valves remains closed or is opened partially while the other is fully opened
• CPC Class Codes: F02D 13/06 Cutting-out cylinders
• CPC Class Codes: F02D 2013/0292 in the start-up phase, e.g. for warming-up cold engine or catalyst
• CPC Class Codes: F02D 2041/001 for engines with variable valve actuation
• CPC Class Codes: F02D 2041/0012 with selective deactivation of cylinders
• CPC Class Codes: F02D 41/0002 Controlling intake air
• CPC Class Codes: F02D 41/0087 Selective cylinder activation, i.e. partial cylinder operation deceleration cut-off F02D41/123
• CPC Class Codes: F02D 41/024 to increase temperature of the exhaust gas treating apparatus
• CPC Class Codes: F02D 41/042 for stopping the engine
• CPC Class Codes: F02D 41/047 Taking into account fuel evaporation or wall wetting; special correction after fuel cut-off F02D41/126
• CPC Class Codes: F02D 41/062 for starting F02D41/061 takes precedence
• CPC Class Codes: F02N 19/004 : Aiding engine start by using decompression means or variable valve actuation
• CPC Class Codes: F02N 99/006 : Providing a combustible mixture inside the cylinder
• CPC Class Codes: Y02T 10/12 : Improving ICE efficiencies
• CPC Class Codes: Y02T 10/40 : Engine management systems

Abstract

A method for starting an internal combustion engine of a hybrid-electric vehicle having a controller, the engine having a plurality of cylinders, each with at least an intake and exhaust valve, each of which may be held in a position for a cycle of a cylinder, the method comprising of deactivating a plurality of cylinders in said engine in response to a signal from the controller of the hybrid-electric vehicle by mechanically deactivating valves in each cylinder of the engine, the deactivation in response to a request from the controller of the hybrid-electric vehicle and to reduce a number of operating valves in each cylinder of the engine.

Claims

1. A method for starting an internal combustion engine of a hybrid-electric vehicle having a controller, the engine having a plurality of cylinders, each with at least an intake and exhaust valve, each of which may be held in a position for a cycle of a cylinder, the method comprising:

deactivating a plurality of cylinders in said engine in response to a signal from the controller of the hybrid-electric vehicle by mechanically deactivating valves in each cylinder of the engine, the deactivation in response to a request from the controller of the hybrid-electric vehicle and to reduce a number of operating valves in each cylinder of the engine.

2. The method of claim 1 where intake valves are deactivated and held closed for cycles of the cylinders.

3. The method of claim 1 where exhaust valves are deactivated and held closed for cycles of the cylinders.

4. A method for starting an internal combustion engine of a hybrid-electric vehicle having a controller, the engine having a plurality of cylinders, each with at least an intake and exhaust valve, each of which may be held in a position for a cycle of a cylinder, the method comprising:

deactivating a plurality of cylinders in said engine in response to a signal from the controller of the hybrid-electric vehicle by mechanically deactivating valves in each cylinder of the engine, the deactivation in response to a request from the controller of the hybrid-electric vehicle and to reduce a number of operating valves in each cylinder of the engine, where the valves held closed include intake valves, adjusting a transmission coupling element coupled to a transmission based on the valve deactivation.

5. The method of claim 4 where the transmission coupling element includes a torque converter.

6. A method for starting an internal combustion engine of a hybrid-electric vehicle having a controller, the engine having a plurality of cylinders, each with at least an intake and exhaust valve, each of which may be held in a position for a cycle of a cylinder, the method comprising:

deactivating a plurality of cylinders in said engine in response to a signal from the controller of the hybrid-electric vehicle by mechanically deactivating valves in each cylinder of the engine, the deactivation in response to a request from the controller of the hybrid-electric vehicle and to reduce a number of operating valves in each cylinder of the engine, where the valves held closed include exhaust valves, adjusting a transmission coupling element coupled to a transmission based on the valve deactivation.

7. The method of claim 6 where the transmission coupling element includes a torque converter.